public AjaxResult Put([FromBody] Customer _ref)
        {
            var _ajaxResult = new AjaxResult();

            try
            {
                db.Edit(_ref);
            }
            catch (Exception ex)
            {
                _ajaxResult.Success = false;
                _ajaxResult.Message = "fail";
                _ajaxResult.Data    = ex;
            }
            return(_ajaxResult);
        }